written by cail • posted in How-To • 551 views no comments

oops, my v2 boards need a hack

The reason?

We did some experimenting and determined that in fact the different voltages/resistances did effect the charging rates!

Using the 2.8V & 2.0V setup resulted in a 1 Amp charge rate and the 2.0V & 2.0V setup resulted in a 500mA charge rate.

old v2 scheme

v3 scheme

Parts List

LT1302CN8-5
8-pin socket
capacitor 220uF/6.3V+, 2x
capacitor 0.1uF, 2x
1/8W 5% 3.3K resistor
1/8W 1% 75K resistor, 2x
1/8W 1% 49.9K resistor, 2x

1N5818 (or 1N5817, etc) Schottky Diode
10uH power inductor, at least 1A current capability

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